Exelon must address nuclear power plant's flood response plan

The U.S. Nuclear Regulatory Commission (NRC) sent a letter to Exelon Corp. (NYSE: EXC) to address the NRC’s concerns with the 1,700 MW Dresden Nuclear Station’s response plan for external flooding events. The two-unit plant is located in Morris, Ill.

NRC inspectors identified multiple areas of concern during recent inspections conducted in response to the disaster at the Fukushima Daiichi nuclear power plant in Japan. The issues pertain to the plant’s plan to respond to a Probable Maximum Flood, which is a hypothetical flooding level that represents the largest conceivable flood from a combination of the most severe meteorological and hydrologic conditions. Such conditions are highly improbably and have never been known to happen in the area. The issues with the flood plan do not represent an immediate safety issue but are an area where NRC would like additional information.

The two main areas of concerns with the flood response plan are: The quality and viability of the procedure, and the availability and capability of equipment specified in the response plan to fulfill their intended functions.

Dresden was originally licensed for operation in 1966 for a flood value of 506.4 feet above mean sea level. The reactor and other plant structures were constructed at 517 feet above mean sea level, 10 feet above historic flood levels. The NRC changed flood design criteria in 1982, and Dresden developed a response plan to address the disparity between the original and the revised design bases for flooding.

Subscribe to Nuclear Power International magazine

Sponsored by FLSmidth

Related Articles

Flood issues at Arkansas Nuclear One given “yellow” rating by NRC

The U.S. Nuclear Regulatory Commission (NRC) rated as yellow, or of substantial safety significance, two flood protection violations at a nuclear power plant owned by Entergy (NYSE: ETR).

Areva, ENUSA sign enriched uranium supply contract

Areva and Spanish company ENUSA Industrias Avanzadas signed a multi-year contract for the supply of enrichment services.

Follow Power Engineering on Twitter

Products Showcase

Dynamic Fluoride Ion cleaning DFIC of industrial natural gas turbines Hi-Tech Furnace Systems

Dynamic Fluoride Ion Cleaning of IGT Parts

The Dynamic Fluoride Ion Cleaning (DFIC) Process from Hi-Tech Furnace Systems is able to clean deep, narrow cracks of oxides by cycling between negative, atmospheric, and positive pressure.

Latest News

Shutterstock coal production trucks

Weekly Coal Production

The Weekly Coal Production shows how much coal is being produced across the U.S.

Federal Reserve Bank of Dallas Weekly Economic Indicators financial business

The Federal Reserve Bank of Dallas' Economic Indicators

The Federal Reserve Bank of Dallas offers a glimpse into how the markets are doing domestical...

Kvaerner awarded contract for gas-fired power plant in Delaware

Kvaerner North American Construction Inc. and its joint venture partner, Parsons Brinckerhoff...

Canadian Solar purchases two solar projects

Canadian Solar Inc. has acquired a majority interest in two utility-scale solar power project...

Operators Restart Unit 2 at PPL Susquehanna

Unit 2 at the PPL Susquehanna nuclear power plant near Berwick, Pa. resumed generating electr...

Settlement agreement limits cost recovery at Edwardsport

The Indiana Utility Regulatory Commission (IURC) on Dec. 27 modified and approved a settlemen...

Toshiba in talks to sell portion of Westinghouse nuclear unit

Toshiba Corp is in talks  to sell up to 16% of its stake in the Westinghouse Electric Co...

Utah nixes nuclear waste storage facility

Plans to park radioactive waste at a storage facility in Utah have been officially called off.

Archived Articles

2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013

Power Engineering Current Issue

Volume 118, Issue 3

Power Engineering

Article Archives for Power Engineering Magazine

Continuing Education

Professional Development Hours

To access a course listing associated to a specific topic listed below, click on the topic of choice from the list below.

Latest Energy Jobs

View more Job Listings >>

Power Engineering Newscasts

EPA chief: carbon caps will boost economy
Australia, Russia enter nuclear power agreement with Argentina
Largest battery energy storage in North America now operational
EPA chief: carbon caps will boost economy Largest battery energy storage in North America now operational Australia, Russia enter nuclear power agreement with Argentina Texas’ Panda Temple combined cycle plant up and running
Siemens agrees to acquire Dresser-Rand
Safety concrete poured at UAE nuclear reactor power project
Foster Wheeler to upgrade natural gas-fired power plant’s emission controls
GE, TransCanada partner on natural gas turbine design
Energy storage global market to grow to $15.6B by 2024; DOE awards $2M to support taller wind turbine towers; Hinkley Point C nuclear project have financial incentives approved; N.J. company building waste-to-energy project in Ireland